<?php
class Response{
	private $headers = array();
	private $level = 0;
	private $result;
	
	public function addHeader($header) {
		$this->headers[] = $header;
	}
	
	public function redirect($url) {
		header('Location: ' . $url);
		exit;
	}
	
	public function setCompression($level) {
		$this->level = $level;
	}
	
	public function setResult($result) {
		$this->result = $result;
	}
	
	private function compress($data, $level = 0) {
		if (isset($_SERVER['HTTP_ACCEPT_ENCODING']) && (strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip') !== false)) {
			$encoding = 'gzip';
		}
	
		if (isset($_SERVER['HTTP_ACCEPT_ENCODING']) && (strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'x-gzip') !== false)) {
			$encoding = 'x-gzip';
		}
	
		if (!isset($encoding)) {
			return $data;
		}
	
		if (!extension_loaded('zlib') || ini_get('zlib.output_compression')) {
			return $data;
		}
	
		if (headers_sent()) {
			return $data;
		}
	
		if (connection_status()) {
			return $data;
		}
	
		$this->addHeader('Content-Encoding: ' . $encoding);
	
		return gzencode($data, (int)$level);
	}
	
	public function renderResult() {
		if ($this->result) {
			if ($this->level) {
				$result = $this->compress($this->result, $this->level);
			} else {
				$result = $this->result;
			}
	
			if (!headers_sent()) {
				foreach ($this->headers as $header) {
					header($header, true);
				}
			}
				
			echo $result;
		}
	}
	
	public function renderJsonData(){
		echo json_encode($this->jsonData);
	}
	
}